``Product`` objects and then subsequently call ``flush()``, Doctrine will

execute 100 ``INSERT`` queries using a single prepared statement object.

..note::

If ``flush()`` fails, an exception is thrown, which you can catch by wrapping

the ``flush()`` method in a ``try...catch`` block.

Whether creating or updating objects, the workflow is always the same. In

the next section, you'll see how Doctrine is smart enough to automatically

issue an ``UPDATE`` query if the entity already exists in the database.